Filtering device.



No. 628,935. Patented .Iuly I8, 1899. C. 0. GRUBE.

FILTERING DEVICE.

(Application filed Aug. 22, 1898.;

(No Model.)

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. smaller end with an annular enlargement 6,

' ilNiTnn STATES PATE T Urricn.

CHARLES O. GRUBE, OF YORK, N. Y.

FILTERING DEVICE.

SPECIFICATION fOTmiBg part Of Letters Fatent NO. 628,935, dated July 18,1899.

Applicati n fi d August 22, 1898. Serial No. 639,26. (No model.)

T0 all whom it may concern.-

Be it known that I, CHARLES O. GRUBE, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Filtering Devices,of whichthe following is a full and complete specification, such aswill'enable those skilled in the art to which it appertains to make andvuse the same.

This invention relates to filtering devices, and particularly to devicesof this class designed for use by druggists for filtering drugs andother liquid substances.

The invention is fully disclosed in the following specification, ofwhich the accompanying drawings form a part, in which- Figure 1 is acentral vertical section of my improved filtering device; Fig.2, a planView of the filtering-paper which I employ, and Fig. 3 a cross-sectionon the line 3 3 of Fig. 1.

In the drawings forming part of this specification the separate parts ofmy improvement are designated by the same numerals of reference in eachof the views, and in the practice of my invention I provide afunnelshaped device 5, which is provided near its below which the walls7 of the end of the funnel are parallel with the upper walls 8.

Secured within the lower portion of the funnel and concentricallythereof is a hollow conical attachment 9, which is held in position byradial arms 10 and which is open at both ends, and the inner walls ofthe conical attachment 9 are in the same line with the inner walls ofthe upper portion of the funnel 5, and the apex of said attachment isdirected downwardly and is vertically over the opening 11 in the apex ofthe funnel 5.

I also provide a funnel-shaped filtering device 13, which is composed ofordinary filtering-paper and the sides of which are convoluted orplaited, as clearly shown in the drawings, and this funnel-shapedfiltering device is placed in the funnel 5 in the position shown in Fig.1, and the apex thereof passes through the f unnel shaped attachment 9.The object of this construction is to provide increased facilities forthe discharge of the liquids to be filtered through the filtering-paper,and with my improved construction the said liquids pass through the openapex of the fun= nel-shaped filtering device 13 and also through thesides thereof between the upper end of the funnel-shapedattachment 9 andthe in wardly-directed shoulder or projection 14 of the funnel 5, formedby the annular enlarge ment 6, said parts forming an annular space 15,which communicates with the concentric space between the funnel-sh apedattachment 9 and the lower portion of the funnel 5.

By reason of the inner walls of the upper part of the funnel 5 and theinner walls of the conical attachment 9 being in the same line thefiltering-paper is held in place and pie vented from crimping orbreaking, and the liquids to be filtered pass freely therethrough in theusual manner.

My improved filtering device is simple in construction and operation andperfectly adapted to accomplish the result for which it is intended, andit will be apparent that changes in and modifications of theconstruction herein described may be made without departing from thespirit of myinvention or sacrificing its advantages.

Having fully described my invention, I claim as new and desire to secureby Letters Patent 1. Afiltering device consisting of a funnel, the apexend of which is enlarged, and afunnel-shaped attachment secured in saidenlarged end concentrically thereof, whereby an annular space is formedaround said funnel-shaped attachment, and a filtering-paper of conicalshape set into said funnel, and the apex of which passes through saidfunnelshaped attachment, substantially as shown and described.

2. A filtering device consisting of a funnel, the apex end of which isenlarged, and a funnel-shaped attachment secured in said enlarged endconcentrically thereof, whereby an annular space is formed around saidfunnel-shaped attachment, and a filtering-paper of conical shape setinto said funnel, and the apex of which passes through said funnelshapedattachment, the walls of said filtering device being fluted or plaitedand resting against said funnel, substantially as shown and described'3. The herein-described filtering device, comprising a funnel 5, theapex end of which around said attachment, said annular space 7 beingopen at its upper and lower ends, and

said attachment being also open at both ends, I5

substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of the subscribing witnesses, this 18th I day ofAugust, 1898.

CHARLES O. GRUBE. Witnesses:

F. A. STEWART, O. O. OLSEN.

